Submission #1312173

#	Time	Username	Problem	Language	Result	Execution time	Memory
1312173		oloc	Financial Report (JOI21_financial)	C++20	19 / 100	678 ms	435664 KiB

Main

#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
//using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vect;
//#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
//#define ordered_multiset tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
#define pb push_back
#define f first
#define s second

const int N = 1024 * 512;
pii tree[2 * N];
int tree2[2 * N];

bool cmp(pii a, pii b){
    if(a.f != b.f) return a.f > b.f;
    return a.s < b.s;
}

void upd(int v, int val){
    int ind = v;
    v += N;
    tree[v] = {val, ind};
    v /= 2;
    while(v){
        if(cmp(tree[2 * v], tree[2 * v + 1])){
            tree[v] = tree[2 * v];
        }else{
            tree[v] = tree[2 * v + 1];
        }
        v /= 2;
    }
}

pii query(int l, int r){
    l += N; r += N;
    pii wyn = {0, 1e9};
    while(l <= r){
        if(l % 2 == 1){
            if(cmp(tree[l], wyn)){
                wyn = tree[l];
            }
            l++;
        }
        if(r % 2 == 0){
            if(cmp(tree[r], wyn)){
                wyn = tree[r];
            }
            r--;
        }
        l /= 2; r /= 2;
    }
    return wyn;
}
void upd2(int v, int val){
    v += N;
    tree2[v] = val;
    v /= 2;
    while(v){
        tree2[v] = max(tree2[v * 2], tree2[2 * v + 1]);
        v /= 2;
    }
}

int query2(int l, int r){
    l += N; r += N;
    int wyn = 0;
    while(l <= r){
        if(l % 2 == 1){
            wyn = max(wyn, tree2[l]);
            l++;
        }
        if(r % 2 == 0){
            wyn = max(wyn, tree2[r]);
            r--;
        }
        l /= 2; r /= 2;
    }
    return wyn;
}


int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, d;
    cin >> n >> d;

    vect a(n + 1);
    a[0] = 0;

    for(int i = 0; i < 2 * N; i++){
        tree[i].s = 1e9 + 1;
    }
    for(int i = 1; i<= n; i++){
        cin >> a[i];
    }

    map<int, int> skal;
    int it = 1;
    for(int i = 1; i <= n; i++){
        skal[a[i]] = 1;
    }
    for(auto& x : skal){
        x.s = it++;
    }


    for(int i = 1; i <= n; i++){
        a[i] = skal[a[i]];
    }

    deque<int> dq[n + 7], dq2[n + 7];

    vect start(n + 1);
    vector<pii> dp(n + 1);
    vect dp2(n + 1);
    dp[0] = {0, 0};
    dp2[0] = 0;
    upd(0, 0);



    for(int i = 1; i <= n; i++){
        pii w1 = query(0, a[i] - 1); w1.f++; w1.s = a[i];
        pii w2 = query(a[i], it + 7);
        int w3 = max(query2(1, a[i] - 1) + 1, query2(a[i], a[i]));
        dp2[i] = max(w1.f, w3);

        w1.f = max(w1.f, w3);
        if(cmp(w1, w2)){
            dp[i] = w1;
        }else{
            dp[i] = w2;
        }


        int maxi = dp[i].s;
        while(!dq[maxi].empty() && dp[dq[maxi].back()].f <= dp[i].f){
            dq[maxi].pop_back();
        }
        dq[maxi].pb(i);
        while(!dq2[a[i]].empty() && dp2[dq2[a[i]].back()] <= dp2[i]){
            dq2[a[i]].pop_back();
        }
        dq2[a[i]].pb(i);
        upd(maxi, dp[dq[maxi].front()].f);
        upd2(a[i], dp2[dq2[a[i]].front()]);
        if(i - d > 0){
            maxi = dp[i - d].s;
            while(!dq[maxi].empty() && dq[maxi].front() <= i - d){
                dq[maxi].pop_front();
            }
            while(!dq2[a[i - d]].empty() && dq2[a[i - d]].front() <= i - d){
                dq2[a[i - d]].pop_front();
            }
            if(!dq[maxi].empty()){
                upd(maxi, dp[dq[maxi].front()].f);
            }else{
                upd(maxi, 0);
            }

            if(!dq2[a[i - d]].empty()){
                upd2(a[i - d], dp2[dq2[a[i - d]].front()]);
            }else{
                upd2(a[i - d], 0);
            }
        }

//        cout << "i: " << dp[i].f << " " << dp[i].s << "\n";

    }

    cout << dp[n].f;



    return 0;
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 12
• Subtask 5: 5 / 5
• Subtask 6: 0 / 35